@Visitor: Yes, it is ineffective, for the moment. but you must understand that the original gnutella protocol was not designed for anything like ultrapeers. this system adds ultrapeer functionality to the network and still is 100% backwards compatible, that is amazing. it will definitely become more effective as more servents implement ultrapeers. old servents were not designed for it and of course they don't support it. extending open protocols is not easy and it always needs time.